Qin Tian searched for two days and did not find two traitors, so he could only send a telegram to Hai Changqing, telling him the names of the two traitors and all the relevant information, hoping that they would be careful.

Next is the main task of this trip to Harbin, the spies who have been watching in the past two days have been withdrawn, Qin Tian began to arrange the operation, first of all, he sent Yuan Lang and the monk to drive people to and from the various vehicles of 731, and recorded all the information about the car, such as where it came from, and how long the average stay after entering 731.

Qin Tian himself personally followed Yi Chen and Qiao Wu to reconnoiter Unit 731 again, he spent three days to include everything in the wargame simulator, through several reconnaissances, Qin Tian knew that there were actually more than 2,000 devils behind this high wall, most of them should be researchers, because they don't have guns in their hands but can move around at will, and the other ones with guns are the devil army in charge of security, there are about two squadrons, and the rest of the people who are locked in the cell should be the road in the devil's mouth, that is, some people for devils to experiment.

Yi Chen and Qiao Wu couldn't detect the situation inside, but Qin Tian had a wargame simulator that would show everyone or anything in the range when it included the environmental simulation, and then by judging Qin Tian, he would probably find out the situation in Unit 731.

The management of this 731 is stricter than that of the prison, and it is a courtyard with high walls and a high guard, and if it is attacked, I am afraid that it will not even be able to attack the gate, so Qin Tian thought about it and thought that there was only one way to do it, that is, to enter by disguised as a devil, and to disguise himself as a prisoner is not to think about looking for death.

After three days of investigation, Qin Tian made the internal facilities of Unit 731 into a sand table for every operator to be familiar with, and Yuan Lang and the monk also found out that there were three kinds of vehicles to and from Unit 731, one was a vehicle for delivering supplies from the Department of Internal Affairs, one was a vehicle for sending prisoners from prison, and the other was for sending instruments and equipment, raw materials, protective clothing and other professional equipment from Harbin Railway Station.

"Big brother! The car that delivers the prisoners is about once a week or twice, the car that delivers supplies from the Internal Affairs Department is basically once a day or two, and the car that delivers the instruments and equipment is sent directly from the train station! But the timing seems uncertain. Yuan Lang said.

"We happened to see it once, those items were unloaded from the train directly onto the truck and then drove to the 731 Demon Cave!" The brute bear also said,

Qin Tian pondered for a while and said: "We may not be able to use the car that sends the prisoners, sometimes the car that delivers the materials does not even enter the gate, and directly puts the things at the door, this Yi Chen and Qiao Wu found this when they investigated, only the car that sent the equipment entered the 731 unit for the longest time." ”

"But the time of the car to deliver the equipment may not be! Sometimes it may not be delivered once a month. Yuan Lang said,

"How many cars are there to deliver the equipment?"

"This time we saw four cars! The unloading from the train is all wooden crates, and the people who load and unload them are very careful! ”

"Let's go to the warehouse at the train station in the evening!" Qin Tian said,

In the evening, Qin Tian, Yuan Lang and the monk arrived at the warehouse of Harbin Railway Station, in the warehouse guarded by guards, Qin Tian did not find any items related to the 731 troops, it seems that as Yuan Lang said, only the materials transported from the Japanese mainland will be directly sent to the 731 troops.

There is no other way, Qin Tian can only wait, because there is only one way to get inside, the preliminary plan for this operation has been formed, after returning to the hotel, Qin Tian began to use the wargame simulator to deduce this action plan, and finally in order to be more secure, he still exchanged the action plan with the system, and the result made Qin Tian a little angry that the plan given by the system was similar to his own, but the time of each step of the action was severely limited, which was more careful than Qin Tian's plan.

"Big brother! When do we act? ”

"Observe again! Because it is absolutely impossible for us to destroy this 731 unit! There are more than 2,000 devils stationed in it, and it's the same as a prison, there is only one gate to enter and exit, and it is always closed, and it will only be opened when someone enters or leaves, so we only have one chance to enter, and that is to drive in a truck delivering supplies and equipment! Qin Tian said,

"That's easy! We hijacked the car halfway through, but we didn't know when they would deliver the next shipment! ”

"Now we have to wait!" Qin Tian told everyone the whole plan, and then said: "The next thing is our preparations!" In this mission, we only need to destroy the other party's laboratory and archive room! It would be better if you could destroy the bacteriological bomb storage room, but don't even think about saving people! Because we simply can't do it! If you can destroy the relevant information and get the information of other germ troops and leave smoothly, the plan will be considered a success! ”

Feng Yin scrutinized the plan and said, "This plan really has no loopholes! But there is one more important thing to complete, and that is to determine the exact location of the laboratory, the archives! It's so big that we can't find it now, because time simply doesn't allow it! ”

"But we couldn't get in in advance!"

"Why don't I find a way to go in and take a look?" Qiao Wu asked,

"Not to mention that it's very difficult to get in, even if you get in and think about it, I'm afraid it's even harder, it's almost impossible! So we still go according to the plan! Listen to my orders when you get inside! Don't delay when the time comes! Regardless of whether the operation is completed or not, it must be evacuated! Qin Tian didn't want to lose any of his brothers and sisters for this task,

"The car that delivers the equipment should be delivered during the day! We're so risky! The wind said,

"So we have a key part of our plan, which is to find a way to delay the vehicles delivering the equipment until after dark, so that our operation is more likely to succeed." Qin Tian said,

"How to procrastinate?"

"Easy to do! As soon as we find out that there are supplies from the Kamo troops, we can make some noise at the train station! Qin Tian said,

Next, Qin Tian sent Yuan Lang and the monk to stare at the train station, he prepared some Molotov cocktails and organs at home, because the data room and laboratory could not be burned when they went in, and they must leave time for everyone to evacuate, and the devil must not be allowed to think that this is arson, but the fire in the data room and laboratory must be large enough, otherwise the devil will easily extinguish the fire, then the purpose of this time will not be achieved.

Finally, seven days later, a batch of equipment delivered from Japan arrived, Yi Chen, Qiao Wu, Zhou Wei, Pei Qin, Dong Wan and Shao Lu were responsible for making trouble at the train station, Qin Tian also gave them a few time bombs, and after arranging it, they would meet everyone, and their action time was enough.

As expected, when there was an explosion at the train station, the devil army immediately began to investigate suspicious people, and the trucks transporting supplies were also checked, which delayed for more than two hours, and these situations were naturally reported by Unit 731.

Waiting for the four trucks transporting equipment to leave the train station, Qin Tian's plan began to be implemented, the four trucks drove to the outskirts of the city and encountered two broken down military vehicles blocking the road, the escort personnel saw that the front were all soldiers in military uniforms, so they stopped to inquire about the situation, the Qingtian Army wearing devil military uniforms immediately took action, killed the drivers of the four cars and more than a dozen escorts, and then changed into the clothes of these people, and took their documents, Qin Tian gave a good look, and then drove four trucks to the 731 unit, and the rest of the people were all outside to answer.

It should have been notified in advance, seeing that the truck delivering the equipment was coming, the guards checked the documents, counted the number of escorts and the equipment on the car, opened the door and let them go, and the four trucks entered the 731 unit smoothly, and it was already dark at this time.

Everyone has seen the drawings and sand tables drawn by Qin Tian, but they don't know where the laboratory, the data room and the bacteriological bomb storage room are, so they can only temporarily look for judgment when transporting these equipment.

"Qin Tian! The reference room should be in the building! Feng Yin pointed to a two-story red brick building and said,

"Change into a hazmat suit and find it!" Unit 731 has a very tight protective suit, and a gas mask on its head, wearing it, Qin Tian guessed that the guards would not ask about it.

"Split up! Let's go find the lab! The wind said,

"Good! Take Wen Qi with her, she knows how to arrange the mechanism! Qin Tian said to Feng Yin,

The car continued to drive inside, Qin Tian took a few people to change into protective clothing and weapons to find the right time to jump out of the car, and then acted separately, Qin Tian and Fengyu entered the building, and the people walking back and forth were Japanese soldiers, among whom there were a few wearing protective clothing.

Qin Tian found the archive room on the second floor, he pushed the door with Fengyu and entered, and there were four devils inside who were stunned when they saw their clothes, because they didn't need to wear protective clothing to enter the data room, and at the moment when they were stunned, Qin Tian followed Fengyu and knocked them unconscious.

Qin Tian and they didn't delay a second to start looking for the information of the bacteriological troops in various places, because they were all numbered and easy to find, Qin Tian put these documents and files into his arms, and then arranged a small accident mechanism with wires in the data room, and after twenty minutes, the wires here would be short-circuited and ignited some information, in order to let the fire spread quickly, Qin Tian arranged an incendiary package.

When the time comes, a fire will ignite here instantly, Qin Tian hopes that the fire can burn all these materials and archives, because he just read some research data, and when he left, Qin Tian killed the four devils and hid them in the innermost part of the data room, and when the devils put out the fire and found them, Qin Tian estimated that his gang had left.

Now Qin Tian prayed that no one would enter the data room and the laboratory during this period, because Feng Yin and the others should solve the people in the laboratory like themselves, in case someone entered and found the corpse, they could only drive out and kill them.

Qin Tian and Feng Yu left the building after leaving the data room, and when they came out, they saw that Feng Yin and the others had come out, and several people hurried to find the car that pulled the equipment, because it was too late to find the bacteriological bomb storage room now.